Dragon Ball (Official Colored) - Vol. 25 Ch. 303 - Freeza Makes Doubly Sure!!

[MangaDex]

 

[Buttzilla]

If Kuririn's imagination was correct and Freeza's final form was just his third form again but spiker, I don't think he would have had the same lasting impact on the world of anime villains. Or at the very least, marketing would focus more on his first form.

 

[Omb74]

Vegeta's plan is legit funny when you realize it's just that one fan theory: "Saiyans could be invincible if they just abused their Zenkais for easy power." Except, the boosts stopped working after a certain degree of power.

Unless your a villian, like Cell and Goku Black, then it's always signifcant increase in power.